Optical Filters for SWIR
Shortwave infrared (SWIR) is a portion of the electromagnetic spectrum often roughly defined as ranging from 1000 nm to 3000 nm. Improvements in light sources and detection equipment for this range have enabled the use of SWIR wavelengths in a number of remote sensing-based applications. As most items reflect or absorb SWIR wavelengths rather than radiate them directly, detection of these wavelengths can be used to investigate the homogeneity of pharmaceuticals or the volume of a substance in a visibly opaque package. SWIR imaging can also be used to detect minute differences in a surface that are undetectable using visible wavelengths or pierce through dense atmospheric conditions to detect undiscovered structures from the air or space.
Chroma Technology produces numerous filters to work throughout the range of SWIR wavelengths, while blocking unwanted signals. These filters are produced on high quality/low cost substrates that remain insusceptible to industrial, atmospheric, or astronomic environments.